Centuries of weather data puts Britain's cold snap in historical perspective.
Sudden warming more than 10 km above the north pole can mean sudden freezing down here.
Feeding wild birds is discouraged in Australia despite its popularity in other countries. But many Australians still put food out for the birds, and that's not a problem if it's the right food.
Extreme weather led to starfish mass strandings along beaches in Kent and East Yorkshire.
But it's too early to tell whether climate change is to blame.
More than 80% of UK households use gas to heat their homes so the industry has to handle huge swings in demand.
No matter how cold it is, you're lucky you don't live on Venus.